{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "328199",
    "entityType": "User",
    "nonce": "0x013db6f783095324ab9ed16d08e1b1e445f9afb6b24e2f9c9d09a6169897e451",
    "signature": "0xa5ce1c8297872db4eaf37e7f144b5112ed6125ac231ecbcc8b9c4b1ae126e84b45cda1600c14972c037eeb68cd14ec43e4839d8a3b60ef4b6a6bbb04fffce6531c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}